Table 3. Correlation Between Demographic and Lifestyle Factors with Poor Sleep Quality in Groups 1, 2, and 3.
* = Significant (p < 0.05)
BMI: body mass index; EM: electronic media, ESS: Epworth sleepiness score
| Demographic and lifestyle variable | Group 1 (Karl-Pearson’s correlation coefficient) | Group 2 (Karl-Pearson’s correlation coefficient) | Group 3 (Karl-Pearson’s correlation coefficient) |
| Age | -0.333* | 0.445* | 0.739* |
| Sex | 0.885* | 0.785* | 0.511* |
| Weight | -0.163 | 0.113 | -0.112 |
| Height | -0.155 | 0.028 | -0.159 |
| BMI | -0.040 | 0.099 | 0.024 |
| Smoking | 0.508* | 0.446* | 0.511* |
| Tobacco | 0.214 | 0.136 | 0 |
| Alcohol | 0.427* | 0.447* | 0 |
| Diet | 0.535* | 0.374* | 0.366 |
| Timing of Dinner | 0.261* | 0.033 | -0.198 |
| Neck Circumference | -0.244 | 0.067 | -0.391 |
| Physical Activity | 0.071 | 0.079 | 0.276 |
| Sleep Duration | 0.149 | 0.178 | -0.130 |
| EM used (hrs/wk) | -0.361* | 0.377* | -0.061 |
| EM at bedtime | 0.205 | 0.111 | 0 |
| ESS | 0.232 | 0.262* | 0.203 |